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Geometry
Geometry of Straight Lines
Term | Definition |
---|---|
Gradient of straight line | Steepness or slope |
General equation of straight line | y = mx + c |
m | Coefficient of x; value of gradient |
c | Constant term; value of y-intercept |
distance between two points | The absolute value of the difference of the coordinates of the points. |
mid-point | a point equidistant from the ends of a line or the extremities of a figure |
gradient | A difference in concentration, pressure, or electrical charge between two regions. |
parallel | Phrases or sentences of a similar construction/meaning placed side by side, balancing each other |
perpendicular | At an angle of 90˚ to a given line, plane, or surface. |
y-intercept | The Y-coordinate of the point where the line crosses the y-axis. (Y,0) |
x-intercept | The coordinate at which a graph intersects the x-axis. The X-coordinate of the point where a line crosses the x-axis (X.0) |
Straight lines with positive gradient | / |
Straight lines with negative gradient | \ |
What is a straight line? | A straight line is a set of points with no definite starting point or end point |
What is a line segment? | It is a set of points with a definite start and end point |